A1 - Unit 7.1

How Many and How Much

How many is used to ask questions about the quantity of a countable noun.How much is used to ask...

B2 - Unit 6.1

Imperative in Passive Voice

Imperative clauses are used when people tell someone else to do something (an advice, a suggestion, a request, a...

A1 - Unit 11.2

Imperative Mood

The imperative is a structure used to give an order or command.

B1 - Unit 3.2

Inanimate Possessive Case in Time Phrases

The possessive case is used to talk about things that belong to a person, an animal or a thing.We...

A1 - Unit 4.1

Indefinite Articles

Articles are words that define nouns.We use indefinite articles to express non-specific things or general categories.

B1 - Unit 2.1

Indefinite Pronouns

Pronouns are words used to avoid the repetition of a noun.An indefinite pronoun does not refer to any specific...

A2 - Unit 7.1

Indefinite Pronouns: Something and Nothing

Indefinite pronouns do not refer to any specific person, thing or amount.Something refers to objects with unspecified quantity while...

B1 - Unit 8.1

Independent and Dependent Clauses

An independent clause is a group of words with a complete meaning, while a dependent clause is a group...

B1 - Unit 10.1

Indirect Closed Questions

We usually put indirect closed questions in the yes/no form.

A2 - Unit 10.1

Indirect Orders

We use indirect orders to avoid direct orders and when we want to make a request in a more...

B1 - Unit 10.1

Indirect Questions

Indirect questions are used in formal situations where we may need to ask something from someone we don’t know...

A1 - Unit 6.2


The infinitive is the basic form of a verb, and we use it to form other verbal tenses.

A2 - Unit 10.1

Intensifiers and Mitigators

Intensifiers and mitigators are two kinds of adverbs of degree. We use intensifiers to emphasise words or expressions, and...

A2 - Unit 6.1

Invariant Plural Nouns

A few/a little and few/little are quantifiers which mean some/enough or not enough.

B2 - Unit 9.2

Inversion after Negative and Restrictive Expressions

We use inversion when there are negative or restrictive expressions.

B2 - Unit 9.2

Inversion in Conditional Sentences

Inversion is used in conditional sentences to make sentences more formal.

A1 - Unit 8.2

Irregular Comparatives and Superlatives

There are some adjectives and adverbs with irregular comparative and superlative.bad (adj.); badly (adv.); worse; the worst

A1 - Unit 2.2

Irregular Plural Nouns

The plural form is used to indicate that there is more than one person, animal, place or thing. Some...

B1 - Unit 3.1

Irregular Plural Nouns: Borrowings

Borrowings or loanwords are some words whose origins come from other languages (source languages). So, some nouns don’t follow...

B2 - Unit 9.1

Let and Make as Causative verbs

Causative verbs are verbs that show the reason why something took place.

A1 - Unit 10.2


Like, as a verb, is used to express things we enjoy and take pleasure in.

A1 - Unit 10.2

Like, Love and Hate

We use the verbs like, love and hate to express positive (love or like) or negative (hate) feelings about...

B1 - Unit 7.1

May and Might: Modals of Possibility

The verbs may/might belong to the group of modal auxiliary verbs.They are used to talk about the possibility of...

A2 - Unit 8.2

May: Modals of Possibility

May is a type of auxiliary modal verb used to express the possibility for something to happen and also...

B2 - Unit 10.2

Mixed Conditional Clauses

Mixed conditionals refer to conditional sentences that include two different types of conditional modals and are unreal conditional sentences...

B2 - Unit 4.2

Modal Verbs in Passive Voice

We can use passive voice with modal verbs too.

B2 - Unit 6.2

Modals Could and Need in the Past

We also Could and Need to talk about possibilities and to describe that something was different in the past.

B1 - Unit 7.1

Modals May and Might in the Past

The verbs may/might belong to the group of modal auxiliary verbs.When a situation had the possibility to happen in...

B2 - Unit 6.2

Modals of Probability

Modals of deduction and speculation are also called modals of probability. We find them when we want to make...

B1 - Unit 2.2

Modifiers of Comparisons

We can modify adjectives and adverbs in comparative forms in order to intensify the degree of certain words and...

B1 - Unit 7.1

Must and Cannot: Modals of Deduction

Must and cannot are modal verbs that can be used even to express deductions.

B1 - Unit 7.1

Must vs Have to???

Must and have to are used to express certainty, necessity or strong obligation which comes from internal or external...

A2 - Unit 7.1

Must: Modals of Obligation

Must is a type of auxiliary modal verb used to express certainty, necessity or strong obligation which doesn't come...

B2 - Unit 3.2

Narrative Tenses

We find narrative tenses in stories and past events.

B2 - Unit 7.2

Negative Determiners

Negative determiners convey a negative meaning for clauses, words and expressions.

B2 - Unit 1.2

No and Any

We find quantifiers such as no and any with countable and uncountable nouns.

B1 - Unit 8.2

No vs Not

No and not convey a negative meaning for clauses, words and expressions.

B2 - Unit 11.1

Nobody, Nothing and Somebody (Indefinite Pronouns) in Question Tags

We use question tags in different ways, depending on the kind of indefinite pronoun we use.

B2 - Unit 7.2

Nominalization of Adjectives

We use nominalization to turn verbs and adjectives into nouns in order to use them as subjects or objects...

B2 - Unit 1.2

Non Progressive Verbs

Non progressive verbs are related to mental processes, emotional states, possession, sense perception, and some others.

B2 - Unit 7.1

Non-Defining Relative Clauses

Non-defining relative clauses give us information about a person or a thing, just like defining clauses. The information that...

B1 - Unit 5.2

Non-Gradable Adjectives

Non-gradable adjectives cannot vary in intensity or grade.

A1 - Unit 2.1

Noun Gender

Nouns refer to a person, place, thing, event, substance or quality.Nouns have three genders: masculine, feminine and neutral.

A1 - Unit 2.1

Noun with Both Genders

We can find nouns which are the same for masculine and feminine genders.

A1 - Unit 10.1

Object Pronouns

Object pronouns are pronouns which are used as an object that follows a verb or a preposition or as...

B1 - Unit 10.2

Omission of Articles

Omission of articles are allowed in some cases.

B1 - Unit 10.2

Omission of Relative Pronouns

Relative pronouns can be omitted when they are not the subject of the clause.

A2 - Unit 8.2

One and Ones

One and ones are replacing words that are used to avoid repetition.

B1 - Unit 5.2

Order of Adjectives

Adjectives are determiners that modify or describe a person or a thing.When we have more than one adjective, we...

A1 - Unit 7.2

Ordinal Numbers

Ordinal numbers express numerical sequences, positioning elements in a list.1st - First; 2nd - Second; 3rd - Third ...

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